On Tue, Dec 02, 2008 at 10:56:44AM +0100, Pieter Donche wrote: > If one has a system with 7 500Gb SATA disks in a hardware RAID6 > (Areca Raid Controller), then (according to mail J.Chadwick 7 > Nov 2008) they will show up as da (following naming convention > for scsi disks although they are not). > RAID6 will allow about 2,5 Tb for the 'user' (roughly 1 Tb will > be consumed by the parity information of RAID6). > > How will this 2,5 Tb space present itself at the time of initial > install of FreeBSD? > Will this be a single 'disk' ad0 ? .. correct or not (then what)?
It will start out looking like a single large disk /dev/da0. > > If FreeBSD is to put on the system as only operating system (Fdisk: > "A = Use Entire disk"), then will the BSD-partitions will show up as > ad0a (/), ad0b (swap), ad0d (/var) etc... correct or not (then what)? > > Page 427 of the FreeBSD handbook states that due to the use of 32-bit > integers to store the number of sectors is limited to 2^32 -1 > sectors/disk = 2 TB. A layout could be > a / 1Gb, > b swap, > d /root 20 Gb, (a /root partition is from an example of someone who > claims that at boot FreeBSD checks the partions in background except > for the / partition, by keeping / as small as possible, the time to > boot can be mimimized .. correct? but will /root ever be something > big ??) No, it will not. Do not make /root a separate partition/filesystem. Leave it in / > e /tmp 20 Gb, > f /var 20 Gb, > g /usr 20 Gb > this leaves 2420 Gb which is more than 2 Tb, so you can't put all > that in 1 filesystem h /home, you will need to split that in 2 > BSD-paritions, but since you can't have more that 8 BSD-partitions > (highest BSD-partition letter is h), you need to give up at least > one of d, e, f, g. ... correct or not (then what)? If you really need this much disk, there must be a reason. What do you intend to put in it? My suggestion would be to put a lot more in /var because that is where data base utilities default to putting their data. Then you can reduce the amount left over to what would fit in /home. So, a: 1 GB / b: 4 GB swap d: 7 GB /tmp e: 20 GB /usr ports can just be left here then f: 1024 GB /var databases live here g: remainder /home (Approximately 1536 GB) You can shift this around as you need. Maybe 2048 GB /home and 512 GB /var ////jerry > > What is the best scheme of BSD-partitioning in this case? > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[EMAIL PROTECTED]" _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"